Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 660

Spanning Tree Variations The Dell Networking OS supports four variations of spanning tree, as shown in the following table. Table 56. Spanning Tree Variations Dell Networking Term IEEE Specification Spanning Tree Protocol (STP) 802 .1d Rapid Spanning Tree Protocol (RSTP) 802 .1w Multiple Spanning Tree Protocol (MSTP) 802 .1s Per-VLAN Spanning Tree Plus (PVST+) Third Party Implementation Information MSTP is implemented as follows on the Dell Networking OS: • The MSTP implementation is based on IEEE 802.1Q-2003 and interoperates only with bridges that also use this standard implementation. • MSTP is compatible with STP and RSTP. • The system supports only one MSTP region. • When you enable MSTP, all ports in Layer 2 mode participate in MSTP. Configure Multiple Spanning Tree Protocol Configuring multiple spanning tree is a four-step process. 1. Configure interfaces for Layer 2. 2. Place the interfaces in VLANs. 3. Enable the multiple spanning tree protocol. 4. Create multiple spanning tree instances and map VLANs to them. Related Configuration Tasks The following are the related configuration tasks for MSTP. • Creating Multiple Spanning Tree Instances • Adding and Removing Interfaces • Influencing MSTP Root Selection • Interoperate with Non-Dell Networking OS Bridges • Changing the Region Name or Revision • Modifying Global Parameters • Modifying the Interface Parameters • Configuring an EdgePort • Flush MAC Addresses after a Topology Change • Debugging and Verifying MSTP Configurations • Prevent Network Disruptions with BPDU Guard • Enabling SNMP Traps for Root Elections and Topology Changes 660 Multiple Spanning Tree Protocol (MSTP)